Why do you need a diaphragm to sustaina large brain? And komodo dragons' brains must be relatively large, given their size.
so all your saying is the evolution of breathing systems and the brain are linked. that's interesting, but it doesn't really mean anything when it comes to the possibility of the existance of intelligent beings that appear reptilian to us. i'm neutral about this particular theory, though i do feel our evolution has been messed with and quite possibly still is by some force sitting at the top of all our pyramid structures of power: government, banks, corporation, secret societies, etc. members of our government (bohemian grove) and members of these "societies" practice ancient rituals regularly. our corporations use sigils in every aspect of their practice and our banks use paper with sigils all over them to control our perspective. the most obvious realizations about the people in power are enough for me to be open to just about anything. as long as we keep in mind that we don't really know, there's nothing wrong with being open to an idea.